2 * sst_mfld_platform.c - Intel MID Platform driver
4 * Copyright (C) 2010-2013 Intel Corp
5 * Author: Vinod Koul <vinod.koul@intel.com>
6 * Author: Harsha Priya <priya.harsha@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28 #include <linux/slab.h>
30 #include <linux/module.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/soc.h>
35 #include <sound/compress_driver.h>
36 #include "sst-mfld-platform.h"
38 static struct sst_device *sst;
39 static DEFINE_MUTEX(sst_lock);
41 int sst_register_dsp(struct sst_device *dev)
45 if (!try_module_get(dev->dev->driver->owner))
47 mutex_lock(&sst_lock);
49 pr_err("we already have a device %s\n", sst->name);
50 module_put(dev->dev->driver->owner);
51 mutex_unlock(&sst_lock);
54 pr_debug("registering device %s\n", dev->name);
56 mutex_unlock(&sst_lock);
59 EXPORT_SYMBOL_GPL(sst_register_dsp);
61 int sst_unregister_dsp(struct sst_device *dev)
68 mutex_lock(&sst_lock);
71 mutex_unlock(&sst_lock);
75 module_put(sst->dev->driver->owner);
76 pr_debug("unreg %s\n", sst->name);
78 mutex_unlock(&sst_lock);
81 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
83 static struct snd_pcm_hardware sst_platform_pcm_hw = {
84 .info = (SNDRV_PCM_INFO_INTERLEAVED |
85 SNDRV_PCM_INFO_DOUBLE |
86 SNDRV_PCM_INFO_PAUSE |
87 SNDRV_PCM_INFO_RESUME |
89 SNDRV_PCM_INFO_MMAP_VALID |
90 SNDRV_PCM_INFO_BLOCK_TRANSFER |
91 SNDRV_PCM_INFO_SYNC_START),
92 .buffer_bytes_max = SST_MAX_BUFFER,
93 .period_bytes_min = SST_MIN_PERIOD_BYTES,
94 .period_bytes_max = SST_MAX_PERIOD_BYTES,
95 .periods_min = SST_MIN_PERIODS,
96 .periods_max = SST_MAX_PERIODS,
97 .fifo_size = SST_FIFO_SIZE,
101 static struct snd_soc_dai_driver sst_platform_dai[] = {
103 .name = "Headset-cpu-dai",
106 .channels_min = SST_STEREO,
107 .channels_max = SST_STEREO,
108 .rates = SNDRV_PCM_RATE_48000,
109 .formats = SNDRV_PCM_FMTBIT_S24_LE,
114 .rates = SNDRV_PCM_RATE_48000,
115 .formats = SNDRV_PCM_FMTBIT_S24_LE,
119 .name = "Speaker-cpu-dai",
122 .channels_min = SST_MONO,
123 .channels_max = SST_STEREO,
124 .rates = SNDRV_PCM_RATE_48000,
125 .formats = SNDRV_PCM_FMTBIT_S24_LE,
129 .name = "Vibra1-cpu-dai",
132 .channels_min = SST_MONO,
133 .channels_max = SST_MONO,
134 .rates = SNDRV_PCM_RATE_48000,
135 .formats = SNDRV_PCM_FMTBIT_S24_LE,
139 .name = "Vibra2-cpu-dai",
142 .channels_min = SST_MONO,
143 .channels_max = SST_STEREO,
144 .rates = SNDRV_PCM_RATE_48000,
145 .formats = SNDRV_PCM_FMTBIT_S24_LE,
149 .name = "Compress-cpu-dai",
152 .channels_min = SST_STEREO,
153 .channels_max = SST_STEREO,
154 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
155 .formats = SNDRV_PCM_FMTBIT_S16_LE,
160 static const struct snd_soc_component_driver sst_component = {
164 /* helper functions */
165 static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
169 spin_lock_irqsave(&stream->status_lock, flags);
170 stream->stream_status = state;
171 spin_unlock_irqrestore(&stream->status_lock, flags);
174 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
179 spin_lock_irqsave(&stream->status_lock, flags);
180 state = stream->stream_status;
181 spin_unlock_irqrestore(&stream->status_lock, flags);
185 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
186 struct sst_pcm_params *param)
189 param->codec = SST_CODEC_TYPE_PCM;
190 param->num_chan = (u8) substream->runtime->channels;
191 param->pcm_wd_sz = substream->runtime->sample_bits;
193 param->sfreq = substream->runtime->rate;
194 param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
195 param->period_count = substream->runtime->period_size;
196 param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
197 pr_debug("period_cnt = %d\n", param->period_count);
198 pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
201 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
203 struct sst_runtime_stream *stream =
204 substream->runtime->private_data;
205 struct sst_pcm_params param = {0};
206 struct sst_stream_params str_params = {0};
209 /* set codec params and inform SST driver the same */
210 sst_fill_pcm_params(substream, ¶m);
211 substream->runtime->dma_area = substream->dma_buffer.area;
212 str_params.sparams = param;
213 str_params.codec = param.codec;
214 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
215 str_params.ops = STREAM_OPS_PLAYBACK;
216 str_params.device_type = substream->pcm->device + 1;
217 pr_debug("Playbck stream,Device %d\n",
218 substream->pcm->device);
220 str_params.ops = STREAM_OPS_CAPTURE;
221 str_params.device_type = SND_SST_DEVICE_CAPTURE;
222 pr_debug("Capture stream,Device %d\n",
223 substream->pcm->device);
225 ret_val = stream->ops->open(&str_params);
226 pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
230 stream->stream_info.str_id = ret_val;
231 pr_debug("str id : %d\n", stream->stream_info.str_id);
235 static void sst_period_elapsed(void *mad_substream)
237 struct snd_pcm_substream *substream = mad_substream;
238 struct sst_runtime_stream *stream;
241 if (!substream || !substream->runtime)
243 stream = substream->runtime->private_data;
246 status = sst_get_stream_status(stream);
247 if (status != SST_PLATFORM_RUNNING)
249 snd_pcm_period_elapsed(substream);
252 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
254 struct sst_runtime_stream *stream =
255 substream->runtime->private_data;
258 pr_debug("setting buffer ptr param\n");
259 sst_set_stream_status(stream, SST_PLATFORM_INIT);
260 stream->stream_info.period_elapsed = sst_period_elapsed;
261 stream->stream_info.mad_substream = substream;
262 stream->stream_info.buffer_ptr = 0;
263 stream->stream_info.sfreq = substream->runtime->rate;
264 ret_val = stream->ops->device_control(
265 SST_SND_STREAM_INIT, &stream->stream_info);
267 pr_err("control_set ret error %d\n", ret_val);
271 /* end -- helper functions */
273 static int sst_platform_open(struct snd_pcm_substream *substream)
275 struct snd_pcm_runtime *runtime = substream->runtime;
276 struct sst_runtime_stream *stream;
279 pr_debug("sst_platform_open called\n");
281 snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
282 ret_val = snd_pcm_hw_constraint_integer(runtime,
283 SNDRV_PCM_HW_PARAM_PERIODS);
287 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
290 spin_lock_init(&stream->status_lock);
292 /* get the sst ops */
293 mutex_lock(&sst_lock);
295 pr_err("no device available to run\n");
296 mutex_unlock(&sst_lock);
300 if (!try_module_get(sst->dev->driver->owner)) {
301 mutex_unlock(&sst_lock);
305 stream->ops = sst->ops;
306 mutex_unlock(&sst_lock);
308 stream->stream_info.str_id = 0;
309 sst_set_stream_status(stream, SST_PLATFORM_INIT);
310 stream->stream_info.mad_substream = substream;
311 /* allocate memory for SST API set */
312 runtime->private_data = stream;
317 static int sst_platform_close(struct snd_pcm_substream *substream)
319 struct sst_runtime_stream *stream;
320 int ret_val = 0, str_id;
322 pr_debug("sst_platform_close called\n");
323 stream = substream->runtime->private_data;
324 str_id = stream->stream_info.str_id;
326 ret_val = stream->ops->close(str_id);
327 module_put(sst->dev->driver->owner);
332 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
334 struct sst_runtime_stream *stream;
335 int ret_val = 0, str_id;
337 pr_debug("sst_platform_pcm_prepare called\n");
338 stream = substream->runtime->private_data;
339 str_id = stream->stream_info.str_id;
340 if (stream->stream_info.str_id) {
341 ret_val = stream->ops->device_control(
342 SST_SND_DROP, &str_id);
346 ret_val = sst_platform_alloc_stream(substream);
349 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
350 "%d", stream->stream_info.str_id);
352 ret_val = sst_platform_init_stream(substream);
355 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
359 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
362 int ret_val = 0, str_id;
363 struct sst_runtime_stream *stream;
366 pr_debug("sst_platform_pcm_trigger called\n");
367 stream = substream->runtime->private_data;
368 str_id = stream->stream_info.str_id;
370 case SNDRV_PCM_TRIGGER_START:
371 pr_debug("sst: Trigger Start\n");
372 str_cmd = SST_SND_START;
373 status = SST_PLATFORM_RUNNING;
374 stream->stream_info.mad_substream = substream;
376 case SNDRV_PCM_TRIGGER_STOP:
377 pr_debug("sst: in stop\n");
378 str_cmd = SST_SND_DROP;
379 status = SST_PLATFORM_DROPPED;
381 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
382 pr_debug("sst: in pause\n");
383 str_cmd = SST_SND_PAUSE;
384 status = SST_PLATFORM_PAUSED;
386 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
387 pr_debug("sst: in pause release\n");
388 str_cmd = SST_SND_RESUME;
389 status = SST_PLATFORM_RUNNING;
394 ret_val = stream->ops->device_control(str_cmd, &str_id);
396 sst_set_stream_status(stream, status);
402 static snd_pcm_uframes_t sst_platform_pcm_pointer
403 (struct snd_pcm_substream *substream)
405 struct sst_runtime_stream *stream;
407 struct pcm_stream_info *str_info;
409 stream = substream->runtime->private_data;
410 status = sst_get_stream_status(stream);
411 if (status == SST_PLATFORM_INIT)
413 str_info = &stream->stream_info;
414 ret_val = stream->ops->device_control(
415 SST_SND_BUFFER_POINTER, str_info);
417 pr_err("sst: error code = %d\n", ret_val);
420 return stream->stream_info.buffer_ptr;
423 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
424 struct snd_pcm_hw_params *params)
426 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
427 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
432 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
434 return snd_pcm_lib_free_pages(substream);
437 static struct snd_pcm_ops sst_platform_ops = {
438 .open = sst_platform_open,
439 .close = sst_platform_close,
440 .ioctl = snd_pcm_lib_ioctl,
441 .prepare = sst_platform_pcm_prepare,
442 .trigger = sst_platform_pcm_trigger,
443 .pointer = sst_platform_pcm_pointer,
444 .hw_params = sst_platform_pcm_hw_params,
445 .hw_free = sst_platform_pcm_hw_free,
448 static void sst_pcm_free(struct snd_pcm *pcm)
450 pr_debug("sst_pcm_free called\n");
451 snd_pcm_lib_preallocate_free_for_all(pcm);
454 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
456 struct snd_pcm *pcm = rtd->pcm;
459 pr_debug("sst_pcm_new called\n");
460 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
461 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
462 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
463 SNDRV_DMA_TYPE_CONTINUOUS,
464 snd_dma_continuous_data(GFP_KERNEL),
465 SST_MIN_BUFFER, SST_MAX_BUFFER);
467 pr_err("dma buffer allocationf fail\n");
474 /* compress stream operations */
475 static void sst_compr_fragment_elapsed(void *arg)
477 struct snd_compr_stream *cstream = (struct snd_compr_stream *)arg;
479 pr_debug("fragment elapsed by driver\n");
481 snd_compr_fragment_elapsed(cstream);
484 static int sst_platform_compr_open(struct snd_compr_stream *cstream)
488 struct snd_compr_runtime *runtime = cstream->runtime;
489 struct sst_runtime_stream *stream;
491 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
495 spin_lock_init(&stream->status_lock);
497 /* get the sst ops */
498 if (!sst || !try_module_get(sst->dev->driver->owner)) {
499 pr_err("no device available to run\n");
503 stream->compr_ops = sst->compr_ops;
506 sst_set_stream_status(stream, SST_PLATFORM_INIT);
507 runtime->private_data = stream;
514 static int sst_platform_compr_free(struct snd_compr_stream *cstream)
516 struct sst_runtime_stream *stream;
517 int ret_val = 0, str_id;
519 stream = cstream->runtime->private_data;
523 ret_val = stream->compr_ops->close(str_id);
524 module_put(sst->dev->driver->owner);
526 pr_debug("%s: %d\n", __func__, ret_val);
530 static int sst_platform_compr_set_params(struct snd_compr_stream *cstream,
531 struct snd_compr_params *params)
533 struct sst_runtime_stream *stream;
535 struct snd_sst_params str_params;
536 struct sst_compress_cb cb;
538 stream = cstream->runtime->private_data;
539 /* construct fw structure for this*/
540 memset(&str_params, 0, sizeof(str_params));
542 str_params.ops = STREAM_OPS_PLAYBACK;
543 str_params.stream_type = SST_STREAM_TYPE_MUSIC;
544 str_params.device_type = SND_SST_DEVICE_COMPRESS;
546 switch (params->codec.id) {
547 case SND_AUDIOCODEC_MP3: {
548 str_params.codec = SST_CODEC_TYPE_MP3;
549 str_params.sparams.uc.mp3_params.codec = SST_CODEC_TYPE_MP3;
550 str_params.sparams.uc.mp3_params.num_chan = params->codec.ch_in;
551 str_params.sparams.uc.mp3_params.pcm_wd_sz = 16;
555 case SND_AUDIOCODEC_AAC: {
556 str_params.codec = SST_CODEC_TYPE_AAC;
557 str_params.sparams.uc.aac_params.codec = SST_CODEC_TYPE_AAC;
558 str_params.sparams.uc.aac_params.num_chan = params->codec.ch_in;
559 str_params.sparams.uc.aac_params.pcm_wd_sz = 16;
560 if (params->codec.format == SND_AUDIOSTREAMFORMAT_MP4ADTS)
561 str_params.sparams.uc.aac_params.bs_format =
563 else if (params->codec.format == SND_AUDIOSTREAMFORMAT_RAW)
564 str_params.sparams.uc.aac_params.bs_format =
567 pr_err("Undefined format%d\n", params->codec.format);
570 str_params.sparams.uc.aac_params.externalsr =
571 params->codec.sample_rate;
576 pr_err("codec not supported, id =%d\n", params->codec.id);
580 str_params.aparams.ring_buf_info[0].addr =
581 virt_to_phys(cstream->runtime->buffer);
582 str_params.aparams.ring_buf_info[0].size =
583 cstream->runtime->buffer_size;
584 str_params.aparams.sg_count = 1;
585 str_params.aparams.frag_size = cstream->runtime->fragment_size;
588 cb.compr_cb = sst_compr_fragment_elapsed;
590 retval = stream->compr_ops->open(&str_params, &cb);
592 pr_err("stream allocation failed %d\n", retval);
600 static int sst_platform_compr_trigger(struct snd_compr_stream *cstream, int cmd)
602 struct sst_runtime_stream *stream =
603 cstream->runtime->private_data;
605 return stream->compr_ops->control(cmd, stream->id);
608 static int sst_platform_compr_pointer(struct snd_compr_stream *cstream,
609 struct snd_compr_tstamp *tstamp)
611 struct sst_runtime_stream *stream;
613 stream = cstream->runtime->private_data;
614 stream->compr_ops->tstamp(stream->id, tstamp);
615 tstamp->byte_offset = tstamp->copied_total %
616 (u32)cstream->runtime->buffer_size;
617 pr_debug("calc bytes offset/copied bytes as %d\n", tstamp->byte_offset);
621 static int sst_platform_compr_ack(struct snd_compr_stream *cstream,
624 struct sst_runtime_stream *stream;
626 stream = cstream->runtime->private_data;
627 stream->compr_ops->ack(stream->id, (unsigned long)bytes);
628 stream->bytes_written += bytes;
633 static int sst_platform_compr_get_caps(struct snd_compr_stream *cstream,
634 struct snd_compr_caps *caps)
636 struct sst_runtime_stream *stream =
637 cstream->runtime->private_data;
639 return stream->compr_ops->get_caps(caps);
642 static int sst_platform_compr_get_codec_caps(struct snd_compr_stream *cstream,
643 struct snd_compr_codec_caps *codec)
645 struct sst_runtime_stream *stream =
646 cstream->runtime->private_data;
648 return stream->compr_ops->get_codec_caps(codec);
651 static int sst_platform_compr_set_metadata(struct snd_compr_stream *cstream,
652 struct snd_compr_metadata *metadata)
654 struct sst_runtime_stream *stream =
655 cstream->runtime->private_data;
657 return stream->compr_ops->set_metadata(stream->id, metadata);
660 static struct snd_compr_ops sst_platform_compr_ops = {
662 .open = sst_platform_compr_open,
663 .free = sst_platform_compr_free,
664 .set_params = sst_platform_compr_set_params,
665 .set_metadata = sst_platform_compr_set_metadata,
666 .trigger = sst_platform_compr_trigger,
667 .pointer = sst_platform_compr_pointer,
668 .ack = sst_platform_compr_ack,
669 .get_caps = sst_platform_compr_get_caps,
670 .get_codec_caps = sst_platform_compr_get_codec_caps,
673 static struct snd_soc_platform_driver sst_soc_platform_drv = {
674 .ops = &sst_platform_ops,
675 .compr_ops = &sst_platform_compr_ops,
676 .pcm_new = sst_pcm_new,
677 .pcm_free = sst_pcm_free,
680 static int sst_platform_probe(struct platform_device *pdev)
684 pr_debug("sst_platform_probe called\n");
686 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
688 pr_err("registering soc platform failed\n");
692 ret = snd_soc_register_component(&pdev->dev, &sst_component,
693 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
695 pr_err("registering cpu dais failed\n");
696 snd_soc_unregister_platform(&pdev->dev);
701 static int sst_platform_remove(struct platform_device *pdev)
704 snd_soc_unregister_component(&pdev->dev);
705 snd_soc_unregister_platform(&pdev->dev);
706 pr_debug("sst_platform_remove success\n");
710 static struct platform_driver sst_platform_driver = {
712 .name = "sst-mfld-platform",
713 .owner = THIS_MODULE,
715 .probe = sst_platform_probe,
716 .remove = sst_platform_remove,
719 module_platform_driver(sst_platform_driver);
721 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
722 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
723 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
724 MODULE_LICENSE("GPL v2");
725 MODULE_ALIAS("platform:sst-mfld-platform");